NAME

       libcurl-share - how to use the share interface

DESCRIPTION

       This  is an overview on how to use the libcurl share interface in your C programs. There are specific man
       pages for each function mentioned in here.

       All functions in the share interface are prefixed with curl_share.

OBJECTIVES

       The share interface was added to enable sharing of data between curl "handles".

ONE SET OF DATA - MANY TRANSFERS

       You can have multiple easy handles share data between them. Have them update  and  use  the  same  cookie
       database,  DNS cache, TLS session cache and/or connection cache! This way, each single transfer will take
       advantage from data updates made by the other transfer(s).

SHARE OBJECT

       You create a shared object with curl_share_init(3). It returns a handle for a newly created one.

       You tell the shared object what data you want it to share by using curl_share_setopt(3).

       Since you can use this share from multiple threads, and libcurl has no internal  thread  synchronization,
       you  must  provide mutex callbacks if you're using this multi-threaded. You set lock and unlock functions
       with curl_share_setopt(3) too.

       Then,  you  make  an  easy  handle  to  use  this  share,  you  set  the  CURLOPT_SHARE(3)  option   with
       curl_easy_setopt(3),  and  pass  in  share handle. You can make any number of easy handles share the same
       share handle.

       To make an easy handle stop using that particular share, you set CURLOPT_SHARE(3) to NULL for  that  easy
       handle. To make a handle stop sharing a particular data, you can CURLSHOPT_UNSHARE it.

       When  you're  done  using  the  share,  make  sure  that  no  easy  handle  is  still  using it, and call
       curl_share_cleanup(3) on the handle.

SEE ALSO

       curl_share_init(3),  curl_share_setopt(3),  curl_share_cleanup(3)   libcurl-errors(3),   libcurl-easy(3),
       libcurl-multi(3)